JP2006232850A - Herbicide - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new liquid herbicidal preparation. <P>SOLUTION: The liquid herbicidal preparation comprises (a) a grass herbicide that is selected from a compound represented by formula (I), pretilachlor and a mixture thereof, and suspended or dissolved in a vegetable oil, a mineral oil or a mixture thereof, (b) at least one of a herbicide of the sulfonylurea type that is suspended in a vegetable oil, a mineral oil or a mixture thereof, and (c) at least one of a nonionic surfactant or an anionic surfactant, or a mixture thereof. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a novel liquid herbicidal formulation, its production and use of the formulation in controlling the growth of undesired plants in the harvest of cultivated plants.

  In accordance with the present invention, a liquid herbicidal composition (formulation) comprising, in addition to conventional formulation excipients, (a) at least one weed herbicide suspended or dissolved in a non-aqueous liquid phase; At least one sulfonylurea type herbicide suspended in an aqueous liquid phase, and (c) at least one nonionic surfactant or anionic surfactant or a mixture of said nonionic surfactant and anionic surfactant. What is included is proposed.

  The weed herbicides that can be used according to the invention belong to the species of acetanilide, phenoxypropionic acid, pyrimidinyloxybenzoic acid, phenylsulfonyltriazole, oxyacetamide, oxazolidinedione, phenylbenzamide, pyrimidinyl thiophthalide and indane, and preferably Are pretilachlor, sihalofop, pyriminobac, cafonstrol, mefenacet, fentrazamid, oxadiclomephone, pentoxazone, etobenzanid, indanophan, and epoprodan and compounds of the following formula (I):

It is.
The above weed herbicides can also be used mixed together. They exist in dissolved or dispersed form in the non-aqueous liquid phase. The sulfonylurea type herbicide is also preferably dispersed in a non-aqueous liquid phase. These are preferably sinosulfuron, pyrazosulfuron, bensulfuron, azimusulfuron, imazosulfuron, ethoxysulfuron, cyclosulfamuron or halosulfuron or mixtures thereof.

  Preferred non-aqueous liquid phases are all vegetable and mineral oils such as rapeseed oil, soybean oil, sunflower oil, castor oil, pine oil, cottonseed oil, and derivatives of these oils such as esters, especially these oils Methyl esters, as well as paraffin and aromatic mineral oils such as Orchex 796, Shellsol type, Isopar type, aromatic fractions such as Solvesso 200, and esters such as Exxate 700, and mixtures thereof.

  The nonionic and anionic surfactants are conventional, commercially available materials such as ethoxylated vegetable oils, Emulsogen EL, ethoxylated fatty alcohols such as Genapol O-050, ethoxylated alkylphenols such as Synperonic NP8. Ethoxylated polyethylene glycols or polypropylene glycols such as Pluronic type, ethoxylated tristyrylphenol derivatives such as Soprophor 4D384 or Soprophor S / 25, oleyl polyglycol ethers such as Genapol U-050, and silicone interfaces Activators such as Silwet L77, as well as dodecylbenzene sulfonates such as Sermul 88A, alcohol Ether ether sulfonates such as Genapol LRO, lignin sulfonates such as Ultrazin NA, phenol sulfonates such as Sipragil GN and polycarboxylates such as Geron TA72, sulfonated naphthalene / formaldehyde concentrates such as Supragil MSN Sulfosuccinates such as Aerosol OT70PG, polyacrylate derivatives such as Atlox 4913, maleic acid / olefin copolymers such as Sokolan CP9, alkyl polyglycosides, alkyl succinic anhydride derivatives, sorbitan esters, ethoxylated sorbitans・ Ester, alkyl and alkyl aryl ・ Polyglycol ・ Ether ・ Phosphate Tellurium and ethoxylated fatty acid esters, and taurides, such as Hostapon Thkh.

  The above-mentioned herbicides are described in the Pesticide Manual, Eleventh Edition, British Crop Protection Council, 1997. Compounds of formula (I) are known from EP-A-447506, fentrazamid is known from British Crop Protection Conference Proceedings, 1997, 67-72, and oxadichrome mefone is from British Crop Protection Conference Proceedings, 1997 73-80.

  Preferred herbicidal preparations according to the present invention include, as weed herbicides, cyhalofops, pyriminobac, fenfentrol, mefenacet, fentrazamide, oxadiclomephone, (Pentoxazole), etobenzanid, indanophan, epoprodan, pretilachlor, or the following formula (I):

Or a mixture thereof. The formulation according to claim 1.
As the sulfonylurea type herbicide, the preparation according to the present invention is preferably pyrazosulfuron, bensulfuron, azimsulfuron, imazosulfuron, ethoxysulfuron, ethoxysulfuron. Including cyclosulfuron, halosulfuron, cinosulfuron or mixtures thereof.

The non-aqueous liquid phase used is preferably a vegetable or mineral oil or a mixture of these oils.
Possible preferred nonionic surfactants are ethoxylated vegetable oils, ethoxylated fatty alcohols, ethoxylated alkylphenols, ethoxylated polyethylene glycols or polypropylene glycols or copolymers thereof, ethoxylated tristyrylphenol derivatives, oleyl polyglycol ethers Or a silicone surfactant and the anionic surfactant is dodecylbenzene sulfonate, sulfosuccinate, ethoxylated tristyrylphenol sulfate or phosphate, alcohol ether sulfonate, lignin sulfonate, ethoxylated phenol sulfate Or it can be a polycarboxylate.

  An important formulation is a pretilachlor or a compound of formula (I) or a mixture thereof suspended or dissolved in vegetable oil as the weed herbicide, suspended in vegetable oil as the sulfonylurea type herbicide. Benzosulfuron, pyrazosulfuron, azimsulfuron, imazosulfuron or sinosulfuron or a mixture of these as a nonionic surfactant, and a nonionic surfactant as a compound, Is included.

Among these, preferred is the compound of formula (I) suspended or dissolved in vegetable oil as the weed herbicide, and cinosulfuron suspended in vegetable oil as the sulfonylurea type herbicide. And it is a formulation containing the mixture of a nonionic compound and an anionic compound as surfactant.
Among these, more preferred as the weed herbicide is pretilachlor suspended or dissolved in vegetable oil, and sinosulfuron suspended in vegetable oil as the sulfonylurea type herbicide, And it is a formulation containing a mixture of a nonionic compound and an anionic compound as a surfactant.

  A particularly effective formulation is the sulfonylurea-type compound of pretilachlor or a compound of formula (I) or a mixture thereof suspended or dissolved in rapeseed oil or rapeseed oil methyl ester or a mixture thereof as the weed herbicide. As a herbicide, rapeseed oil or rapeseed oil methyl ester or a mixture thereof, bensulfuron, and as the surfactant, castor oil ethoxylate, dodecylbenzene sulfonate, ethoxylated tristyrylphenol, Includes a mixture of nonionic and anionic compounds selected from sulfate and oleyl polyglycol ether.

  The formulations according to the invention have the great advantage that they can contain herbicidal active ingredients in high concentrations and that they remain protected from degradation for a long time. They allow other oil-soluble or liquid mixtures, such as additives suitable for enhancing biological activity, as well as stabilizers, such as epoxidized vegetable oils, can be added without problems. It also provides sex. Surprisingly, the preparations according to the invention have no practical harm to the harvest of cultivated plants after their application, regardless of the use of organic liquids.

  The preparation according to the present invention is preferably suitable for controlling weeds in paddy fields with water. The method is advantageously applied to water flowing directly between paddy fields, where the required amount of the formulation is mixed with an equal amount to 10 times the amount of water and applied directly to the paddy field. It is carried out in such a way that it is added (so-called splash application). Furthermore, simultaneously with planting of rice, the preparation can also be applied as a part or part (so-called dip application).

Spray application of the formulation according to the invention is possible as well, but requires a higher dilution with water.
The application rate of the formulation according to the invention can vary within a wide range. It is preferable to use 50 to 2000 g / ha of herbicide (weed herbicide plus sulfonylurea type herbicide).

  The liquid preparation according to the present invention contains 30 to 1920 g of weed herbicide and 20 to 80 g of sulfonylurea type herbicide and 50 to 300 g of surfactant (anion plus nonion) per liter. Usually 2 to 20 l / ha of the formulation described in the examples below is required for direct or release application. For release applications, this amount is usually 20 to 500 l / ha. The preparations according to the invention are further customary additives such as inert carriers, such as kaolin and chalk, stabilizers, antifoams, preservatives, viscosity modifiers, thickeners, for example It may also contain silicic acid or bentonite, binders, tackifiers, and fertilizers or other active ingredients. The formulations are prepared in a known manner, for example by mixing the active ingredient directly with the formulation excipient and liquid or solid carrier and / or grinding with it.

A particularly preferred formulation is prepared as follows:
Example of formulation

Application Examples Formulations F1, F2, F3, F4, F5, F6, F7, F8, F9 and F10 are diluted to 5 liters with water and introduced directly into the paddy field with water at an application rate of 5 liters / ha. (Release application). On the 22nd day after application, control of weeds, Echinochloa, Sirpus, and Monochoria, and the phytotoxic activity of the formulation against rice (100% is considered to be complete or complete control of weeds) And 0% indicates no weed control or no phytotoxic activity against rice). This occurs in tests performed in parallel with echinochlor, a) during germination, b) at the 2.5 leaf stage, and c) at the 4.1 leaf stage. The results obtained in the above test are summarized in the following table:

  The same result is obtained when the formulation is diluted with water, for example, to 2-500 l.

Claims (10)

A liquid herbicidal formulation,
(A) at least one grass herbicide suspended or dissolved in a vegetable oil or mineral oil or mixture of these oils, wherein the herbicide has the following formula (I):

Selected from the compounds represented by: pretilachlor, or mixtures thereof;
(B) at least one sulfonylurea type herbicide suspended in a vegetable or mineral oil or mixture of these oils; and (c) at least one nonionic surfactant or anionic surfactant or nonionic surfactant. And a mixture of anionic surfactants,
Said formulation comprising:   Examples of the sulfonylurea type herbicides include pyrazosulfuron, bensulfuron, azimsulfuron, imazosulfuron, ethoxysulfuron, cyclosulfuron, cyclosulfuron, cyclosulfuron, cyclosulfuron, ethoxysulfuron, cyclosulfuron. Or the formulation of claim 1 comprising cinosulfuron or a mixture thereof.   Nonionic surfactants include ethoxylated vegetable oils, ethoxylated fatty alcohols, ethoxylated alkylphenols, ethoxylated polyethylene glycols or propylene glycols or copolymers thereof, ethoxylated tristyrylphenol derivatives, oleyl polyglycol ethers or silicones. A surfactant, or as the anionic surfactant, dodecylbenzene sulfonate, sulfosuccinate, ethoxylated tristyrylphenol sulfate or phosphate, alcohol ether sulfonate, lignin sulfonate, ethoxylated phenol sulfate or A polycarboxylate or a mixture of these nonionic and anionic surfactant compounds. A formulation as claimed.   As the weed herbicide, pretilachlor or a compound of the formula (I) or a mixture thereof suspended or dissolved in vegetable oil, or bensulfuron (suspended in vegetable oil as the sulfonylurea type herbicide) Bensulfuron, pyrazosulfuron, azimsulfuron, imazosulfuron or cinosulfuron or a mixture thereof, and a mixture of a nonionic compound and an anionic compound as said surfactant, The preparation described in 1.   The preparation according to claim 4, comprising as the weed herbicide, a compound of formula (I), and as the sulfonylurea type herbicide, cinosulfuron.   The preparation according to claim 4, comprising pretilachlor as the weed herbicide and cinosulfuron as the sulfonylurea type herbicide.   As said weed herbicide, rapeseed oil or rapeseed oil methyl ester or a mixture thereof suspended in or dissolved in pretilachlor or a compound of formula (I) or a mixture thereof is used as said sulfonylurea type herbicide. Bensulfuron suspended in oil or rapeseed oil methyl ester or mixtures thereof, and as the surfactant, castor oil ethoxylate, dodecylbenzene sulfonate, ethoxylated tristyrylphenol sulfate and oleyl polyglycol The preparation according to claim 4, comprising a mixture of a nonionic compound and an anionic compound selected from ethers.   The formulation according to claim 7, comprising a compound of formula (I) as the weed herbicide.   Use of the liquid herbicidal formulation according to claim 1 in controlling the growth of undesired plants in the harvest of cultivated plants.   Claims for the control of undesired plant growth in rice by direct application of the formulation to an already watered rice field, to a freshly watered rice field or during rice planting 9. Use according to 9.